Glowing in the Dark

Invitation
to a mealBioluminescence can serve as a lure to attract prey. The
viperfish, Chauliodus sloani, has a luminescent lure on the end of a modified fin ray that it
can arch forward in front of its mouth. In the dim depths, all that the viperfish's
would-be prey sees is a glowing morsel. When this prey comes in close, the
viperfish quickly impales it with its enormous, viper-like fangs. These fangs
are so long that if they were fully inside its mouth, the fish would impale its
own brain.